Mass. Gen. Laws ch. 152 § 65B
If, after the issuance of a policy under section sixty-five A, it shall appear that the employer to whom the policy was issued is not or has ceased to be entitled to such insurance, the insurer may cancel or otherwise terminate such policy in the manner provided in this chapter; provided, however, that any insurer desiring to cancel or otherwise terminate such a policy shall give notice in writing to the rating organization and the insurer of its desire to cancel or terminate the same; and provided further, that if the reason for cancellation is for nonpayment of premium, if the insurer receives the amount of premium due on or before the effective date of cancellation, the assigned carrier shall issue an accurate renewal policy. Such cancellation or terminations shall be effective unless the employer, within ten days after the receipt of such notice, files with the department's office of insurance objections thereof, and, if such objections are filed, the commissioner, or his designee shall hear and decide the case within a reasonable time thereafter. Further appeal of the decision of the department may be taken to the superior court for the county of Suffolk.
Mass. Gen. Laws ch. 152, § 65B